Mechanical and microstructural properties of broadband anti-reflective TiO2/SiO2 coatings for photovoltaic applications fabricated by magnetron sputtering

Zambrano, Darío; Villarroel, Roberto; Espinoza-González, Rodrigo; Carvajal, Nicolás; Rosenkranz, Andreas; Montaño-Figueroa, A. Gabriela; Arellano-Jiménez, M. Josefina; Quevedo‐Lopez, Manuel; Valenzuela, Paulina; Gacitúa, William

doi:10.1016/j.solmat.2020.110841

Cited by 66 publications

(25 citation statements)

References 90 publications

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“…How different crack patterns were correlated with the E distributions throughout the thickness of the oxide scale can be understood through fracture toughness (K c ). 34,35 On the assumption that the oxide scales are isotropic and linear elastic (following linear elastic fracture mechanics), their K c value is then associated with the critical stress for crack propagation (σ c ) and crack length (a)…”

Section: Resultsmentioning

confidence: 99%

“…How different crack patterns were correlated with the E distributions throughout the thickness of the oxide scale can be understood through fracture toughness ( K c ). , On the assumption that the oxide scales are isotropic and linear elastic (following linear elastic fracture mechanics), their K c value is then associated with the critical stress for crack propagation (σ c ) and crack length ( a ) where γ s is the specific surface energy and Y is the dimensionless parameter that takes into account the crack condition and specimen shape. , Accordingly, the fracture propagates through the oxide scales along the path with the lowest E value. In STS4A, E increased from the surface of the oxide scale toward the bulk/oxide scale interface (Figure a).…”

Section: Resultsmentioning

confidence: 99%

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In SituScanning Electron Microscopy Analysis of the Interfacial Failure of Oxide Scales on Stainless Steels and Its Effect on Sticking during Hot Rolling

et al. 2022

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Despite various strategies to address sticking failure in stainless steels (STSs), difficulties in understanding its fundamental mechanisms hinder precise solutions during STS fabrication. This study investigated the effect of chromium (Cr) content on the microstructures and failure modes of oxide scales under a tensile load, simulating the hot-rolling process. The dynamic, real-time behavior of crack initiation, propagation, and interfacial delamination in the oxide scales under tension was analyzed using an in situ scanning electron microscopy (SEM) tensile test. With a high Cr content, iron (Fe) oxide and chromium(III) oxide (Cr 2 O 3 ) form a layered structure, which is delaminated along the interfaces between the thin Cr 2 O 3 layer and the bulk after perpendicular cracking. The saturated crack densities obtained from in situ SEM provide interfacial strength, while the elastic modulus and hardness obtained from nanoindentation provide vertical fracture strength. In combination with an ex situ elemental image analysis, the in situ SEM results reveal three different failure modes of the four different STSs. The results confirm that sticking failure is more likely to occur as the Cr content increases.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

In SituScanning Electron Microscopy Analysis of the Interfacial Failure of Oxide Scales on Stainless Steels and Its Effect on Sticking during Hot Rolling

et al. 2022

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“…To date, several studies have been carried out to reduce reflections from glass by using ARCs. Zambrano et al 202 designed ARCs by depositing multi-layers of TiO 2 and SiO 2 using magnetron sputtering on a glass substrate. The prepared samples were annealed at 400°C and showed reflectance improvement of about 2% thus improving the overall performance.…”

Section: Other Miscellaneous Techniquesmentioning

confidence: 99%

Recent advances in the mechanical durability of superamphiphobic surfaces: A review

Singh

Kango

Sharma

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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Superamphiphobic (water and oil repellent) surfaces have distinct application areas such as anti-corrosion, anti-friction, anti-icing, self-cleaning, etc. To fabricate these types of surfaces, the base material must have low surface energy and dual-scale roughness (micro and nano levels). The durability of such surfaces is indicated by the duration up to which they remain stable and effective. When mechanical forces interact with these surfaces, it deteriorates the surface integrity and ultimately degrades its superamphiphobic property. Hence, these surfaces have very limited mechanical wear sturdiness and long-term durability. Therefore, in this article, efforts have been made to review the different types of mechanical durability tests performed on superamphiphobic metallic and non-metallic surfaces. Moreover, various kinds of surface texturing techniques in context with durability of such surfaces have been discussed. Finally, from the reported literature, critical conclusions, challenges, and scopes for future work have also been presented.

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“…Among different light management strategies, anti-reflective coatings, − textured surfaces, , plasmonic, − or light scattering layers are used in photovoltaic devices. Photonic crystals (PCs) have also attracted particular attention because of their unique ability to mold the flow of light. − The photonic band structure allows to control light collection and emission of the devices, notably through photonic band gaps or quasi-guided mode excitation presenting a Fano resonance lineshape. ,− In the case of MAPbI 3 -based PSCs, enhancing light harvesting efficiency in the long-wavelength range is particularly important because light absorption of MAPbI 3 typically decreases between 500 and 800 nm. , …”

Section: Introductionmentioning

confidence: 99%

Inverse Opal Photonic Nanostructures for Enhanced Light Harvesting in CH₃NH₃PbI₃ Perovskite Solar Cells

Daem

Mayer

Spronck

et al. 2022

ACS Appl. Nano Mater.

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Light management strategies using photonic crystals have been proven to efficiently improve light harvesting and subsequently conversion efficiency of various optoelectronic devices. This study focuses on 3D inverse opal CH 3 NH 3 PbI 3 photoanodes in perovskite solar cells from a combined numerical and experimental approach. Varying the pore size and the layer thickness in numerical simulations, we first determined theoretical optimum from a purely optical point of view. Corresponding 3D inverse opal photonic nanostructures were then fabricated through spin-coating protocols using polystyrene nanospheres of various diameters as hard templating sacrificial agents. It demonstrates how the photonic nanostructuration of the perovskite layer impacts both optical and electronic properties of experimental samples. Regarding the individual 3D inverse opal perovskite layers, an optimum of light absorption is reached for an ∼500 nm diameter pore photonic nanostructure, with a photonic absorption enhancement as high as 16.1% compared to an unstructured compact benchmark. However, in addition to electronic-related countereffects, local light absorption in the hole transporting material is observed in assembled solar cells, weakening the light management benefits of the perovskite layer nanostructuration to only ∼3% photonic enhancement.

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Mechanical and microstructural properties of broadband anti-reflective TiO2/SiO2 coatings for photovoltaic applications fabricated by magnetron sputtering

Cited by 66 publications

References 90 publications

In SituScanning Electron Microscopy Analysis of the Interfacial Failure of Oxide Scales on Stainless Steels and Its Effect on Sticking during Hot Rolling

In SituScanning Electron Microscopy Analysis of the Interfacial Failure of Oxide Scales on Stainless Steels and Its Effect on Sticking during Hot Rolling

Recent advances in the mechanical durability of superamphiphobic surfaces: A review

Inverse Opal Photonic Nanostructures for Enhanced Light Harvesting in CH₃NH₃PbI₃ Perovskite Solar Cells

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Mechanical and microstructural properties of broadband anti-reflective TiO2/SiO2 coatings for photovoltaic applications fabricated by magnetron sputtering

Cited by 66 publications

References 90 publications

In SituScanning Electron Microscopy Analysis of the Interfacial Failure of Oxide Scales on Stainless Steels and Its Effect on Sticking during Hot Rolling

In SituScanning Electron Microscopy Analysis of the Interfacial Failure of Oxide Scales on Stainless Steels and Its Effect on Sticking during Hot Rolling

Recent advances in the mechanical durability of superamphiphobic surfaces: A review

Inverse Opal Photonic Nanostructures for Enhanced Light Harvesting in CH3NH3PbI3 Perovskite Solar Cells

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Product

Resources

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Inverse Opal Photonic Nanostructures for Enhanced Light Harvesting in CH₃NH₃PbI₃ Perovskite Solar Cells